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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e7cd8939db610d8d67c8bfcf51e63270cd6b0dd60c7a939791f2952e596b211' 
  AND token = 'ubc1y0YqQjx1FmfL8KOOAdm6CEvL5DbwXIQLGHzuReQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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