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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '783d355dbbdea8eb87ca3e54dc9923cc3468f82bccb9d63784024ef1cbe720d3' 
  AND token = 'rA0GOzCP0b4kkziGFjeGoP/p/7XY6+Uizr2iyMNit9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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