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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b600b5149bc5be2260e0e52d8ecd357e6207897fe7438c24e634f2b92c4e4417' 
  AND token = 'pF065Fsyl4BEXmPVMu+mlYO55yQqcNkHQ8UYvxT0xjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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