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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7da618751277b8e824f0add2cfa450c6aca7207564854c1a9d1bc8ebcbdcfb8f' 
  AND token = 'hPIht8O7s+5u6UT1UffxRDX176FwOQn7qbddEhsK37E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}