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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2a0581be0d2705100978bc762ab4e73bb37b6eb561ed66e996dfaaaef3cae3a5' 
  AND token = 'Iu99wKC+PR0zZSR6vrMpMHIB6ccRONo+n9OUItAuu5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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