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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '38fcf800962a39efc9c1e6a66ffedf1f8e00643543c73b8a2aa4d5fec034449b' 
  AND token = 'ZPqaA+I2b/A2QKB7/ocuiOZJiJgbvnuKoMIyrnybPEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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