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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '652c77d22a0c1b1dd55df68da3ee34c15813851b5ccb5e33a0f22c36cd73eaa1' 
  AND token = '77i2okfcevF8SwtvrLfEoQlnVx4dejHAOOAIaKVlojA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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